Its structutal support so id replace the tank. You could risk it if you have a floor drain but if it were my house it would be replaced.
The Stock aquariums rely on the plastic braces. They are very important to the structure of the aquarium and need to be present. I would suggest draining tank and replacing. If you need further help give us a buzz.
Yes. You might get lucky, but if you don't it will be a catastrophic failure
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